Electronic Engine Management

The electronic engine management's principal task is to co-ordinate all parameters through continuous process control in order to assure economical and ecological engine operation. Parameters controlled include the ignition timing, the amount of fuel injected, the duration of injection and exhaust gas recirculation as well as the throttle valve setting, variable intake manifold position, variable turbine geometry (on turbocharged engines) and the camshaft adjustment (on petrol engines), etc. In order to perform these tasks, the electronic engine management system also monitors the engine speed, engine temperature, fuel grade (by means of a knock sensor) and accelerator pedal position. Any deviations from normal operating conditions are stored in the fault memory together with the corresponding information, so that the causes can be investigated the next time the vehicle is serviced.